Title :
Downsampling versus folding in the DCT domain
Author :
Prost, Rémy ; Diab, Chaouki
Author_Institution :
Inst. Nat. de la Sante et de la Recherche Med., Lyon, France
fDate :
11/1/1996 12:00:00 AM
Abstract :
Signals can be split into subbands using ideal bandpass filters in the discrete cosine transform (DCT) domain. We show that decimation by band folding is not equivalent to downsampling but results in two convolution operations that involve both the odd and even samples of the signal
Keywords :
band-pass filters; convolution; digital filters; discrete cosine transforms; signal sampling; DCT domain; band folding; convolution operations; decimation; discrete cosine transform; downsampling; folding; ideal bandpass filters; samples; subbands; Convolution; Discrete Fourier transforms; Discrete cosine transforms; Filter bank; Filtering; Finite impulse response filter; Image coding; Image reconstruction; Signal processing; Signal resolution;
Journal_Title :
Signal Processing, IEEE Transactions on
